Telegraph-repeater.



G. L. RAWDON. TELEGRAPH REPEATEB.

APPLICATION rum) APR. 24, 1913.

1,1 06,001 Patented Aug. 4, 1914.

" ,35 1 I Lumina- THE'NaRRls PETERS CO. PHOIO-LITHCL, WASHING roN. D C,

UNITED STATES i PATENT OFFICE. a

enononnnAwnon, or CLEVELAND, 01m.

TELEGRAPH-REPEATER.

To all whomilt may concern Be it known that LGEonon L. RAWDON,

a citizen of the United States of America, residing at, Cleveland, in the countyot Guyahoga and State of Ohio, have invented certain new and usefulImprovements in Telegraph-Repeatersrand I hereby declare the following to be a full, clear, and exact de scription, of the invention, such as will enable others skilled inthe art toiwhich it pertains, to make and use the same.

This invention relates to certain new and useful improvements in automatic telegraph: repeaters and particularly to improvements on the repeaters shown in my Patent No. 914,877, dated March 9th, 19O9, and in my Patent No. 1,048,209, dated December 24th,

1912, and has for its object to provide another mode of operation to produce more of the time element which insures the locking of the opposite relay before the main line current is removed from it, and its unlock ing after theimain line current has been restored, and thereby making the operation of the repeater ;more secure 1n preventlng a kick or momentary flying back of the relay armature lever; in cases wherehigh tension spring adjustments arere'quiredin adjusting the relayto receive incoming signals.

My invention in: part consists 1n prov1ding a triple woundmagnetirikeach main receiving relay by winding a third coil on the differentlal magnet of leachvmain receiving relay, shown1 in my above referred to patents, and further providing theqrepeating Sounders with auxiliary levers on which are placed the main line repeating pointspaand the points for operating the third coils which are wound on the aforementioned differential magnets. I

My invention also consists in the features of construction and combination of parts,

hereinafter a, described in the specification, pointed out in the claims and illustrated in the accompanying drawing I In the accompanying drawings is shown,

somewhat conventionally, my improved telegraph repeater and the mucus electrical connect1ons,'where1n;10 represents one main line, which, for the sake of convenience, I

shall call the east line, 11 the main receiving relay, 12 the repeating sounder and 13 the main battery of the: west line. Likewise I 10 represents the othermain line, which I Specification of Letters Patent. P3tentedAug, 4 11914 Application filed April 24, 71913. Serial No. 762,190.

shall call the west line, 11 the main receiving relay, 12' the repeating sounder and 13 thewmain battery of the east line. I

The main receiving relay 11 is provided with a main electromagnet 14in theeast line, a triple wound magnet consisting: of two oppositely wound coils 15 and 16which form a part of a localcircuit controlled in part by the opposite relay 11 and a third coil 15" of no particular number of turns I wound on thesame cojre and in the same dn-ectlon as the equal c011 15 thatis always intact andnot in the direction of the equal c011 16 that includes the break point of the opposite relay, and a pivoted armaturelever 17 adapted to engage afront contact point 18 and a rear stop 19. A spring 20 is attached to the armature lever 17 and tends to I pull the latter away=from the contact point 1S and against the stop 19. The, main recelvingrelay 11" is likewise provided with a main electric-magnet 14 in the westline, a

triple wound magnet consisting, of two op- I positelywound coils 15;and 16' whichlform a part of a local circuit controlled inpart by the opposite relay I11 and a third coil 15 of no particular number of turns wound on the samecore and in the same direction as the equal coil 15' that is always intactrandnot in the same direction as the equal coil 16" that includes Itheabreak point a of the opposite relay, and a pivoted armature lever 17 adapted toengage a frontlcontact point 181and a rear stop 19%, A spring 20 is at? I the stop 23* and away from a stop 23, In

proximity to the armature lever 24 ismounted an auxiliary lever I24. The auxiliary lever24 carries a contact point 22 and a contact point 36 which areinsulatedpfrom each; other. The contact: point 22rismarranged to make contact with theficontact point on the end of the lever 24 iand the contact point 36 is arranged totmake con- I tact with a point 35 whichcontro1s the circuiti initheythird coil, A, spring] 24"; isicon- I nected with the lever 24* and tends to pull the lever 24? in the direction of the stationary contact point 35.

The repeating sounder 121 is provided with an electro-magnet' 21" locatedin the local circuit with the coil 16 controlled by the relay 11 and also a pivoted armature lever 24. A spring 25( connected to the ar- 7 mature lever 24 tends to draw the armature lever against a stop 23 and away from a stop 23". In proximity to the armature lever 24" is mounted an auxiliary lever 24?.

The auxiliarylewr 24L- carries a contact point 22 and a contact point 36 whichare insulated from each other. The contact point 22" is arran ed to make contact with the point on the end of the lever 24 and the contact point 36 isarranged to make contactwithithe' stationary point A spring 24 isc'onnected with the lever 24* and tends to pull the' lever 2 t in the direction of the stationary contact point 35.

' I "shall nowdesc'ribetlie two local circuits which 'I employ inlrny repeater. The one local circuit is provide'd 'with a battery 26 which is connected by conductors 27 to a point at which the circuit divides and to the coils'15 and 16 of the differential magnet which coils are in parallel toeach other or in the opposite legs of the divided circuit.

' The coil 16 is connectedb-y a conductor 28 to the contact point 18 of the main receiving relay-'11 and the armature lever 17 of the same relay is connected by a conductor 29*to0ne terminal of the coil 2l, the other terminal of the coil 21 being connected to a point baby a conductor 29; I Theterminal of'the coil '15 isconnected by a conductor, 33 to'the point m. The terminal of the coil 15' is connected by a conductor 34: to contact point 36 on auxiliary lever 24 The contact point 35 is connected conductor 37 to a point m and included in conductor33 is an'artiiicial resistance 31',

The other terminal of the-battery 26 is conne'cted by a conductor 32 to the point m.

The coil 16" is connected by a conductor 28 to the contact point 18 of the vmain reeeiving relay 11 and'the armature lever 17 of the same relay is connected by aconductor 29? to one terminal of the coil 21,"t he otherterminal of said coil 21 being connecte'dtona point'm by a conductor 29 The terminal of .the'coil 15 is'c'onnected by a conductor 38 to the point m and in said conductor is. included an "artificial resistance edbya conductor 34f to the contact point 31.- The terminal of the coi1 15 'is connect- 36 011 auxiliary lever 24:; The contact point 35] is connected by-conductor 37' to point t m". The other terminal-ofthe battery 26;

is connectedby-"a conductor l 32 to-the Under normal conditions and when neithei' line 5in usef'both' lecal circuits in the 'tWO oppositely wound equal coils are closed, the armature lever of each 'main'receiving'rela'y being held'onto the front con-l" tact point against the tension of the spring by themagn'etizing effect of the main'magnet coil, the, magnetizing effects of the two oppositely wound equal. coils being nil, as

ing effect to prevent the armature lever of;

I from its front contact point. As soon as the the western relay from being, drawn away eastern relay armature lever leaves its "front contact it also opens the circuit in the coil of the repeating sounderwhich permits the spring of. the repeating sounder to draw its armature lever away from its front contact point, releasing the auxiliary lever and causing the points on the upper end of the V auxiliary lever to strike together, thereby closing, the circuit in "the third 'coilfof the auxiliary magnet of the opposite relay. When the points on the upper end ofthe auxiliary lever strike together and the repeating sounder armature lever continues on its backward stroke, the points on the lower end of the auxiliary lever and on the upper end of the repeating sounder armature. lever, are parted, thereby breaking the main line circuit and causing the signal to be transmitted to 'the'west'line. As the third coiliswound in the same direction as the'equal 0011, that is always intact, it ,is apparent that after the circuit in the third coil has been closed, its magnetic effect is the same as that of the equal coil that is always intact, and. the western relay armature lever 7 is now held closed by thejoint'rnagnetic' 1 effects of the third coil and 'the'equal coil that'is always intact, the circuit in'the equal coil that includes the break points'ofthe eastern relay armature lever, having"been previously opened by the eastern relay armature lever. The reverseoperation, or the re storing of the main linecurrent and the unlocking of the opposite relay is described as follows:If the operator ofthe east 'line'r closes the east -line,-the relay armature lever 17 is drawn onto itsfront contactagainst "the tension of the relayspring, closing the circuit'of the repeating sound'ercoil 21' and I drawing the repeating sounder armature le-=' t ver 24 toward its front contact, against the tension of' the repeating sounder (spring,

causing the point on the :upper end of the repeating 'souilder lever :to strike the point.

on the lower end of the auxiliary lever 24, thereby restoring the main line current.

When the main line repeatin points strike together, the repeating soun er armature lever continues on toward its front stop 23*, forcing the auxiliary lever forward, breaking the circuit in the third coil at the points 35 and 36 on the upper end of the auxiliarylever, demagnetizing it, there- :by unlocking the western relay, as the two oppositely wound equal1 coils neutralize each other.

When the eastern relay armature lever reaches its front contact which closes the circuit in the equally wound coil it had previously opened in looking the western relay, it does not unlockthe western relay, as the magnetic efl'ect of the third coil holdsithe western relay armature lever closed until the circuit inthe third coil is opened in the points 35 and 36 on the upper end of the auxiliary lever 24:.

What .I claim is;-

1.,In a telegraph repeater, a pair of receiving relays, each having, a repeating sounder, a main magnet and a triple wound magnet and means whereby the armature lever of one relay and the armature lever of the same relays corresponding repeating sounder controls directly two coils? of the triple wound magnet of the other relay.

2. In a telegraph repeater, a pair of repeatingsounders, a pair of receiving relays, each :relay having a main magnet and a triple wound magnet, two coils of said triple wound magnet being equal and oppositely wound, means whereby the armature lever of one relay controls directly one of said two equal; and oppositely wound coils of the triple Wound magnet of the other relay, and

means whereby the third coil or remaining and means whereby the third or remaining,

coil of the same triple wound magnet is con trolled directly by the armature lever of one of the repeating Sounders.

4. In a telegraph repeater, a receiving relay having, a main magnet and 3a triple wound magnet, the triple wound magnet having two equal and oppositely wound coils, one of which is always intact, and a third coil which is wound in the same direction as the coil which is always intact of the said two equal and oppositely wound coils.

In testimony whereof, I sign the foregoing specification, in the presence of two witnesses.

GEORGE L, RAWDON; Witnesses:

VICTOR O. LYNCH, N. L. MODONNELL.

Copies of this patent may be obtained tor flve cents: each, by addressing the commissioner otllatentsn Washington, D. G. 

